1 Задача

bracket

if (process.argv.length !== 3) {
    console.error('Введено:\n\t' + process.argv[0] + ' ' + process.argv[1] + ' [аргуенты для функции]')
    process.exit(1);
}

var str = process.argv[2];

if (checkBrackets(str)) {
    console.log('Все верно!');
} else {
    console.log('Неверно');
    process.exit(2);
}

function checkBrackets(str) {
    var opening = ['{', '(', '['];
    var closing = ['}', ')', ']'];
    var stack   = [];
    var i       = 0;
    var index, bracket, expected;

    for(i; i < str.length; i++ ){
        bracket = str[i];

        if( (index = opening.indexOf(bracket)) !== -1 ){

            stack.push(index);

            console.log(stack)
        } else if ((index = closing.indexOf(bracket)) !== -1){
            expected = stack.pop();
            if (expected !== index) {
                return false;
            }
        }
    }

    if(stack.length > 0) {
        return false;
    }

    return true;
}

// Запуск node index.js '{{([])}}'